Prosecutors in the Raj Rajaratnam insider-trading case have complained for months that the Galleon Group founder's legal team has gone to great lengths to conceal its planned defense. But at least some of that secrecy must come to an end, the judge presiding over the case has ruled.

U.S. District Judge Richard Holwell on Friday ordered Rajaratnam's lawyers to immediately disclose which of the thousands of wiretaps in the case it plans to introduce as evidence. They have a little more time when it comes to expert testimony, with the judge giving them until March 22 to provide that information, more than two weeks after the trial is scheduled to begin.

"Rajaratnam shall immediately identify any wiretap or consensually recorded telephone calls that he presently intends to introduce into evidence at trial and provide the government with the expert disclosures," Holwell wrote.